Steam-shovel, &amp;c.



3 Sheets-Sheet I.

(No maal.)

No. 708,590. Patented Sept.. 9, |902.

A. w. nomsun.

STEAM'SHUVEL, &c.

(Application filed May 20, 1902.)

(No Mod I.)

Patented sept; 9, mm2.

A. w. RUBINSDN. STEAM sHovEL, am.

(Applicaein mea myo, 1902.)

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Vw fa m w l l l l WW1/momo wz Nonws Firms' coV Primo-umn.. wAsmNGYoN. n, c.

UNITED STATES.`

PATENT UEETCE.

ARTHUR W. ROBINSON, OF MONTREAL, CANADA.

sTEAM-sHovEl., cto.

. SPECIFICATION forming part of Letters Patent N o. 708,590, dated September 9, 1902.

Y Application led May 20, 1902. Serial No. 108,273. lLNG model.)

.T tu wwnt it may con/cern,.-

Be it known that I, ARTHUR W. ROBINSON, a citizen of the Dominion of Canada, and a resident of the city of Montreal, in the Province of Quebec, in the Dominion of Canada, have invented a certain new and useful Improvement in Steam-Shovels and the Like Structures, of which the following is a full, clear, and exact specification, reference being had to the accompanying drawings.

My invention refers, generally stated, to that class of steam-shovels in which there is a single dipper mounted upon a boom; and it relates more particularly to the construction fore applied in a more direct manner.

of the boom itself and the manner of hoisting the dipper, as well as the mechanism for swinging or revolving the boom.

In steam-shovels as heretofore constructed the hoisting devices have been placed upon the body of the car or float and the hoistingchain carried out to the dipper by means of a greater or less number of guiding-sheaves in order to permit of the swinging movement of the boom without interfering with the hoisting movement. This method involves a large amount of wear and tear and a considerable loss of power due to the deiiection of the hoisting-chains around the sheaves. By my improved construction the boom and hoisting-engines bothrotate together around the aXisof revolution, so that no guiding-n sheaves are required, and the power is there- Various other incidental advantagesare likewise obtained, which will be described hereinafter.

Referring to the drawingshereof, I do not illustrate the minute details of construction of many of the parts shown, because they are well understood, and the drawings are much simpler thereby. For the same reason I have entirely omitted certain devices usually present in an operative machine, because they form no essential part of the invention. Also I Wish it `to be understood that although I show my invention as applied to a steamshovel mounted upon a car or truck I do not limit myself to thatconstruction, since obviously the improvement in whole or in part is adapted to be used upon a scow or any other suitable support.

View of the same. Fig. 3 is a side elevation of the lower end of the boom, showing the hoisting-engine more in detail. Fig. 4 is a plan View of one-half of that which is shown in Fig. 3. Fig; 5 is a rear View, certain parts being shown in section, of the parts shown in Fig. 3. Fig. 6 is a sectional view of the lower half of the friction-clutch and hoistingdrum. Fig. 7 is a side view of the frictionclutch illustrated in Fig. 6. Fig. 8 is a detail of the boom, dipper-arm, and thrust mechanism, partly in section.

Referring to Figs. l and 2, A is the body of the car or similar support. B is the boom, which in order to better utilize certain features of my invention I prefer to make of a special construction, which is made the subject of a separate application for Letters Patent. C is an A-frame mounted on the front of the car, from which the boom is suspended by apair of suspender-stays D. (See Fig. 1.)'

The A-frame is sustained by a pair of back-I stays D. Any suitable support for these parts may be employed. E is one of the cylinders/of the main hoisting-engines, which are attached to the sides of the boom B. F is the hoisting-drum, which is driven by the engine E by means of two pairs of gears, which,with their attachment,will be described later on. G G (see Fig. 2) are jack-arms, which are or may be of the usual construction, for the purpose of contributing to the stability of the machine when at work. F (see Fig. l) is the hoisting chain or rope. F2 is a sheave at the point of the boom to carry the hoisting-rope. F3 is the dipper, and F4 is the dipper-arm, which may be of any usualconstruction, as also may be the dipper; but I prefer to use, with my invention, a special form of dipper, which is madethe subject of a separate application for Letters Patent. H represents the cylinders of a pair of engines placed upon the platform ot' the car or other support, and they are used for the double purpose of swinging the boom and propelling the entire machine upon the track. For this purpose the engines are geared to a drum G, from whichtwo swinging ropes or chains are led off, G2 G2, and attached to the turn-table B. These engines being reversible, it will be seen that by revolving the drum in either direction the boom is swung as may IOO be required. The power of the swinging engines is transmitted to the drum G' by means of two pairs of gears, as shown. G3 is the intermediate shaft of this train of gearing, on which are two pinions'G4and G5. G4 drives the swinging drum G', and G5 drives a propelling-shaft G6, located beneath the car, as shown in Fig. 1, whereby through the brakechain G7, which engages with the axles of the car-trucks, it is propelled in either direction, as desired. The pinions G4 and G5 are loose upon the shaft and are driven by means of a double-jawed clutch placed between them, as indicated in Fig. 2, by means of which either one may be called into action while the other remains stationary, so that when the operator is engaged in swinging the boom the pinion G4 is constantly in gear, and the motion is controlled by the engines, which are made to revolve in either direction at will. When, however, the operator desires to move the machine upon the track, the pinion G5 is thrown into gear,and the engines may be then used for propelling the machine as a whole, while the swinging attachment remains inactive. II (see Figs. 1 and 8) represents a saddle-block for the purpose of guiding the dipper-arm F4, which is made in two parts, as shown in Fig. 8, in its proper position. The arm is tted with racks F5 on its under side, which engage with pinions H2, mounted upon a shaft H2, to which are connected the pulleys or gear-wheels H4, which control the thrust for the dipper-arm, which may be connected with an independent thrust-engine or otherwise operated. I prefer to make the saddle-block of the form shown in Fig. 8- that is to say, with the central cavity in it, so that the hoisting rope or chain F may operate through this cavity. The opening in the saddle-block extends down nearly to the shaft, thus permitting the hoisting rope or ropes to pass freely.

Referring now to Figs. 3, 4, and 5, I is a base-plate firmly attached to the front of the car or other support.` On this base-plate is formed a'turn-seat and upwardly-projecting gudgeon J, (see Fig. 5,) which receives the rotary collar J which revolves upon the gudgeen J. This collar J has formed upon it two seats J2, (see Fig. 3,) one on either side, which receive the feet of the boom J 2. In my construction I prefer to make the two feet J 3 in one piece and integral with the two engine-frames J4, because by this construction great strength and rigidity are secured. E, as above stated, is the engine, which is directly attached to the side of the frame J4. This frame also has lianges J5 (see Fig. 5) formed upon it to receive the web or horizontal plate J6 of the turn-table. The rim J 7 of the turntable (see Fig. 3) is made of channel-iron for the purpose of carrying the swinging ropes. The engine may be of any usual form, although I prefer to use a type having the steam-chests on top of the cylinder for convenience of access and the valves actuated by an arm E, as shown. These hoisting-engines are geared to the hoisting-drum F. The first pair of gears are the pinion K (see Fig. 4) and the gear K2, and the second pair are the pinion K3 and the gear K4. In order more fully to utilize the advantages of my invention, I prefer to make the pinions and gears just above referred to in duplicate, as shown in Fig. 4, which, as stated, illustrates onehalf only of the parts, placing the hoistingdrum F between them.

In order to more effectually transmit the power of the engine to the drum F, I employ the friction-clutch and drum mechanism illustrated in Figs. 6 and 7, and it will be remembered that Fig. 6 illustrates the lower half only of the parts in question. F, as above stated, is the hoisting-drum. F8 is the shaft on which it turns. M is a clamp provided with the bolt M and nuts M2, whereon the hoisting rope or ropes F' may be clamped to the outside of the drum and then carried into the inside thereof through the hole or holes in the rim, as shown at M3. By this means the ends of a duplex or doubled hoisting-rope may be both fastened to the drum by the same clamp. Certain advantages iiow from the use of a doubled hoisting-rope which Ido not refer to here, because it forms the subject-matter of a separate application for Letters Patent; but I illustrate thus much of the features involved, because they may be beneficially employed in conjunction with the improvements now under consideration. K4 K4 are two spur-gears. (Shown in half-section in Fig. 6 and in full in Figs. 3 and 4.) They are bolted directly to the flanges on the ends of the drum F, so that they practically form one piece with it. K3 represents the pinions that drive the gears K4, and they have a iianged housing M4 on the inside of the spurgears K4, which receives the friction-band M5. This friction-band may be lined with wooden blocks, as shown, or other suitable material, as is customary. K2 is the intermediate spur-gear, which receives its motion from the crank-shaft of the engine, as shown in Figs. 3 and 4. This gear is rmly keyed on its shaft, and at one point in its periphery it has a bearing MG. This is to receive the short shaft M7, upon which are supported certain levers for the purpose of actuating the friction-band. One arm of the lever M8 eX- tends inwardly and is connected to a radiusrod M9, by means of which it can be moved in and out. I do not here describe in detail the particular means by which the lever M8 may be actuated. There are a number of mechanical devices by which this may be done. One of the ways which I prefer to use is that shown in my Patent No. 465,536, dated December 22, 1891. The short end of the lever M8 is connected to the brake-band by a bolt M10, the other end of the brake-band being attached to a Xed pin or stud M11 in the rim of the gear, which serves as a driver. The action of the mechanism is apparent. It

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will be seen that by actuating the lever MS in any convenient manner the friction bands (it will be remembered that there are two of them) M may be tightened or loosened and the power consequently applied or released and that when so released the drum, with its attached spur-gear K4 and its connectingpinions K3, is free to revolve in any way without interfering with the gear K2. The interior surface ofthe rim of the spur-gears K4 is formed to receive an internal brake-band N (see Fig. 6) for the purpose of controlling the movement of the hoisting-ropes. It can be actuated in any convenient manner.

Owing to the fact that the engines are mounted on the boom, and consequently revolve with it, it becomes necessary to provide means to conduct steam to the engines and an exhaust away from them. This is done by a steam-pipe L, (see Fig. 5,) which is connected to the boiler and is suspended between the A-frame C directly on the axis of revolution of the boom. This steam-pipe is'there- `fore stationary, and a swivel-joint L is used,

- The exhaust-steam is carried down uthrough the lower center by means of an exhaust-pipe L4, (see Fig. 5,) which is connected with the cylinders, as shown clearly at L6 in Fig. 5. This exhaust is also fitted with a swivel-joint located beneath the car, and the pipe is carried from thence into the smoke-stack.

The action of the machine as a whole is now clear. F and its directly-connecting engines, all of which are mounted upon the boom, I obtain a very direct and convenient application of the power to the flipper, there being only one sheave interposedbetween the hoisting-drum and the dipper. The hoisting-engines, with drum and gearing, being located immediately overthe axis of revolution of the boom afford very slight resistance by their weight to the movement of swinging, and by the removal of these engines from the door of the car, float, or other support and placing them i because they are more or less directly connected with otherA applications for Letters Patent which I have iiled for improvements in dipper construction and boom construction. i

By means of the hoisting-drumV It will be obvious to those whoare familiar with this art that modifications may be made in the details of construction of the parts involved without departing from the essentials of my invention. I therefore do not limit my`` self to such details.

Having described my invention, I claim- 1. In a dredge or like machine the combi-` nation of a boom rigidly attached to a turntable the turn-table itself and a hoisting-engine and drum located upon the boom and centered about the axis of revolution thereof, for the purpose set forth.

2. In a dredge or like machine the combination of a boom rigidly attached to a turntable, the turn-table itself feet rigidly connected to the boom beneath the turn-table which enters steps therefor ina rotatable collar supported upon the axis of revolution, said collar itself, and a hoisting-engine and drum located upon the boom and centered about the axis of revolution thereof, for the purpose set forth.

3. In a dredge or like machine the combination of a boom rigidly attached to a turntable,the turn-table itself feet rigidly connected to the boom beneath the turn-table which enters steps therefor in a rotatable collar supported upon the axis of revolution, said collar itself, and a hoisting-engine and drum located upon the boom and centered about the axis of revolution thereof, and steam supply and exhaust pipes leading to and from the cylinders of the engine and provided with swivels located on the axis of revolution, for the purpose set forth.

Il. In a dredge or like machine the combi` nation of a boom mounted upon and turning with a turn-table the turn-table itself and a hoisting-engine and drum located upon the boom and turning therewith, for the purpose set forth.

5. In a dredge or like machine the combination of a boom provided with feet at its lower ends which enter steps therefor in a rotatable collar and said collar itself supported upon the axis of revolution of the boom, for the purpose set forth.

6. In a dredge or like machine the combination of a boom provided with feet at its lower ends which enter steps therefor ina rotatable collar and said collaritself supported upon the axis of revolution of the boom, and a hoisting-engine and drum located upon the boom and turning with it, for the purpose set forth.

7. In a dredge or like machine the combination of a boom supported upon and turning with a turn-table, the turn-table itself a hoisting-engine and drum located upon the boom, feet at the lower end of the boom which enter steps therefor in a rotatable collar said collar itself supported upon the axis of revolution and steam supply and exhaust pipes leading to andfrom the hoisting-engine each comprising stationary and movable sections suitably connected together, for the purpose set forth.

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8. In a dredge or steam-shovel or like machine the combination of a two-part dipperarm, a saddle-block adapted to engage with the arm, a hoisting-rope which passes between the lwo parts of the dipper-arm and means for controlling the thrust of the dipper-arm, for the purpose set forth.

9. In a dredge or like machine the combination of a drum, spur-gears for actuating the drum, pinions loosely mounted on a shaft which engage with the spur-gears and a friction-clutch located between said spur-gears and which engages with suitable surfaces on said pinions, for the purpose set forth.

10. In a dredge or like machine the combination of a drum, spur-gears for actuating the drum, pinions loosely mounted on a shaft which engage with the spur-gears and a friction-clutch'located between said spur-gears and which engages with suitable surfaces on said pinions, and a brake adapted to engage with said spur-gears and control the running of the drum, for the purpose set forth.

1l. In a dredge or like machine the combination of a boom, hoisting-engines and adrum located upon the boom surrounding the axis of rotation thereof and duplex gearing connecting the hoisting engine or engines with the boom, for the purpose set forth.

12. In a dredge or like machine the combination of a boom, hoisting-engines and a drum located upon the boom surrounding the axis of rotation thereof, gearing connecting the hoisting engine or engines with the boom, and steam supply and exhaust pipes having a swivel connection located in the axis of rotation of the boom, for the purpose set forth.

13. In a dredge, steam-shovel, or like machiney the combination of a two-part dipperarm and a centrally-recessed saddle-block adapted to engage with the arm and a hoisting rope or ropes adapted to pass through said recessed saddle-block, for the purpose set forth.

14. In a dredge or like machine the combination of a drum having holes in its sides through which the draft-ropes may pass and a clamp adapted to engage with the two ends of the hoisting-ropes and conne the same, for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ARTHUR W. ROBINSON.

Witnesses:

J. B. ROBINSON, E. M. CORBET. 

